Dell POWEREDGE M1000E - Manual (Page 176)

160 Dell Converged Enhanced Ethernet Command Reference
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debug spanning-tree
11
debug spanning-tree
Enables debugging for the Spanning Tree Protocol.
Synopsis debug spanning-tree {all | bpdu {rx | tx {all | interface port-channel number | {in |
ex}tengigabitethernet slot/port}}
no debug spanning-tree {all | bpdu {rx | tx {all | interface port-channel number | {in |
ex}tengigabitethernet slot/port}}
Operands all Turns on spanning tree packet debugging on all interfaces.
bpdu Turns on Bridge Protocol Data Unit debugging.
rx Turns on debugging for only received spanning-tree packets.
tx Turns on debugging for only transmitted spanning-tree packets.
interface port-channel number
Specifies the port-channel interface. The range of valid values is 1-63.
interface Use this keyword to specify any of the following interfaces:
extengigabitethernet
Specifies a valid external 10 Gbps Ethernet interface.
slot Specifies a valid slot number.
port Specifies a valid port number.
intengigabitethernet
Specifies a valid internal 10 Gbps Ethernet interface.
slot Specifies a valid slot number.
port Specifies a valid port number.
Defaults By default debugging is not turned on.
Command
Modes
Privileged EXEC mode
Description Use this command to enable debugging for the Spanning Tree Protocol. Use the no debug
command to disable debugging.
Usage
Guidelines
To display debugging outputs on a particular cmsh session, use the terminal monitor command.
Examples To enable debugging of spanning-tree for both Rx and Tx on 10 Gbps Ethernet interface 0/1:
switch#debug spanning-tree bpdu rx interface intengigabitethernet 0/1
switch#debug spanning-tree bpdu tx interface intengigabitethernet 0/1
switch#show debug spanning-tree
MSTP debugging status:
Spanning-tree rx debugging is off
Te 0/1 rx is on
Spanning-tree tx debugging is off
Te 0/1 tx is on